83605 ZIP Code — Caldwell, ID

Canyon County, Idaho

ZIP code 83605 is located in Caldwell, Idaho, within Canyon County. It covers approximately 24.63 square miles and serves a population of 39,636 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 208.

About ZIP code 83605

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $256,200. Owner-occupancy sits near the national average at 66%.

Median household income is $58,952. SNAP benefit usage at 17% of households reflects economic stress in the area.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 24 minutes is near the national average.

College attainment at 14% is below the national average, consistent with a trades and production-oriented local economy.

15% of residents lack health insurance, above the national average.

Overall, ZIP code 83605 reflects a community defined by a trades-oriented workforce and elevated reliance on food assistance.

39,636

population

24.63

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

83605 ZIP code map

Cities in ZIP code 83605

Below are the cities the US Postal Service accepts for ZIP code 83605. Using any city not on this list may result in mail delivery delays.

City	Status
Caldwell	Acceptable
Caldwell	Preferred

Nearby ZIP codes

83607 Caldwell (4.9 mi) 83651 Nampa (5.2 mi) 83644 Middleton (6.1 mi) 83687 Nampa (7.2 mi) 83687 Nampa (7.2 mi) 83669 Star (8.3 mi) 83626 Greenleaf (9 mi) 83646 Meridian (11.2 mi) 83646 Meridian (11.2 mi) 83646 Meridian (11.2 mi) 83686 Nampa (13.3 mi) 83676 Wilder (13.6 mi)

Demographics updated 05/2026

Population
Total population	39,636
Population density	1,609 / sq mi
State FIPS	16
County FIPS	027

Geography
Land area	24.63 sq mi
Water area	0.26 sq mi
Latitude	43.6681
Longitude	-116.6483
Timezone	Mountain (MT)
Area code	208

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.4%	42.3%	41.8%
$50k – $100k	35.6%	36.9%	34.0%
$100k – $200k	16.2%	17.8%	19.5%
Over $200k	1.8%	3.0%	4.7%

Demographics & statistics

39,636

Population

1,609

People per sq mi

31.5

Median age

$58,952

Median household income

$22,059

Per capita income

$256,200

Median home value

$935

Median monthly rent

65.8%

Home ownership

14.7%

Poverty rate

4.9%

Unemployment

9,114

Housing units

14.0%

Bachelor's or higher

Age distribution

Male Female

1,491

Under 5

1,466

1,305

5–9

1,284

1,993

10–14

1,960

1,969

15–19

1,937

1,646

20–24

1,619

2,509

25–34

2,468

2,711

35–44

2,666

2,022

45–54

1,989

1,190

55–59

1,171

927

60–64

911

1,224

65–74

1,204

773

75–84

760

222

85+

219

← Male

Female →

Age summary

Group	Count	%
Under 18	11,642	29.4%
18 and over	27,994	70.6%
65 and over	4,402	11.1%
Median age	31.5 years

Race & ethnicity

White 48.4%

Hispanic or Latino 23%

Other race 16.7%

Two or more races 9.5%

American Indian / Alaska Native 1.4%

Asian 0.6%

Black or African American 0.4%

Group	Count	%
White	24,900	48.4%
Hispanic or Latino	11,812	23%
Other race	8,597	16.7%
Two or more races	4,864	9.5%
American Indian / Alaska Native	737	1.4%
Asian	298	0.6%
Black or African American	219	0.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.4%	42.3%	41.8%
$50k – $100k	35.6%	36.9%	34.0%
$100k – $200k	16.2%	17.8%	19.5%
Over $200k	1.8%	3.0%	4.7%

Under $10k 4.6%

$10k–$15k 5.4%

$15k–$25k 12.3%

$25k–$35k 9.0%

$35k–$50k 11.6%

$50k–$75k 22.7%

$75k–$100k 14.8%

$100k–$150k 16.9%

$150k–$200k 1.7%

$200k+ 1.1%

Range	% of households
Under $10k	4.6%
$10k–$15k	5.4%
$15k–$25k	12.3%
$25k–$35k	9.0%
$35k–$50k	11.6%
$50k–$75k	22.7%
$75k–$100k	14.8%
$100k–$150k	16.9%
$150k–$200k	1.7%
$200k+	1.1%
Median income	$58,952

Housing

Home values

Under $50k 8.7%

$50k–$100k 3.2%

$100k–$150k 6.5%

$150k–$200k 14.1%

$200k–$300k 30.3%

$300k–$500k 31.9%

$500k–$1M 5.3%

Housing overview

Metric	Value
Median home value	$256,200
Median rent / month	$935
Owner occupied	65.8%
Renter occupied	34.2%
Vacant	3.9%
Single-family detached	70.5%
Large apartment buildings	4.0%
Mobile homes	8.2%
Median rooms	5.6
Avg household size (owned)	3.10

Year built

Era	%
2020 or later	0.8%
2010–2019	12.2%
2000–2009	20.1%
1990–1999	14.9%
1980–1989	5.5%
1970–1979	12.7%
1960–1969	10.8%
1950–1959	6.5%
1940–1949	6.6%
1939 or earlier	9.9%

Bedrooms

Size	% of units
No bedroom (studio)	1.2%
1 bedroom	7.1%
2 bedrooms	25.1%
3 bedrooms	46.0%
4 bedrooms	16.3%
5+ bedrooms	4.3%

Vehicles per household

Vehicles	% of households
No vehicle	4.4%
1 vehicle	27.3%
2 vehicles	39.5%
3 or more	28.8%

Heating fuel

Fuel type	%
Utility gas	62.8%
Electricity	33.1%
Propane / LP gas	1.5%
Fuel oil	0.9%
Wood	1.3%
Solar	0.1%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	6,114	46.9%
Cohabiting couple	979	7.5%
Male householder, no spouse	2,272	17.4%
Female householder, no spouse	3,669	28.1%
Households with children under 18	5,081	39.0%
Households with seniors (65+)	3,307	25.4%
Average household size	2.90

Marital status

Status	Male	Female
Never married	38.3%	31.7%
Married	48.4%	44.9%
Separated	0.8%	1.8%
Widowed	2.1%	8.1%
Divorced	10.4%	13.5%

Education

Less than 9th grade 9.2%

Some HS, no diploma 11.6%

HS graduate 33.2%

Some college, no degree 23.7%

Associate's degree 8.2%

Bachelor's degree 10.4%

Graduate / professional 3.6%

Metric	%
HS diploma or higher	79.2%
Bachelor's or higher	14.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	551	4.6%
Kindergarten	542	4.5%
Elementary school	5,244	43.8%
High school	3,002	25.1%
College / grad school	2,633	22.0%

Employment

Industry of employment

Education & healthcare 22.1%

Manufacturing 12.9%

Construction 12.2%

Retail trade 10.9%

Professional & management 9.9%

Arts, food & hospitality 7.7%

Transportation & utilities 7.0%

Other services 3.9%

Agriculture & mining 3.4%

Public administration 3.3%

Finance & real estate 2.9%

Wholesale trade 2.2%

Information 1.7%

Occupation

Category	%
Management, business & arts	23.7%
Service	21.9%
Sales & office	15.8%
Natural resources & construction	19.0%
Production & transportation	19.5%

Employment type

Type	%
Private sector	81.9%
Government	12.1%
Self-employed	5.7%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	76.9%
Carpool	10.8%
Public transit	0.4%
Walk	2.6%
Work from home	8.6%
Other means	0.6%
Avg commute (minutes)	24.3

Poverty

All people 14.7%

Under 18 years 18.7%

18 and over 12.9%

Married-couple families 7.2%

Female-led households 23.2%

Income support

Source	% of households
Social Security	29.0%
Retirement income	20.5%
Supplemental Security	5.8%
Cash public assistance	5.9%
Food stamps / SNAP	17.4%

Health indicators

Condition	%
Obesity	39.4%
High blood pressure	31.2%
High cholesterol	30.7%
Diabetes	11.3%
Heart disease	6.0%
Stroke	3.2%
Asthma	11.0%
Arthritis	22.1%
Kidney disease	3.0%
Pulmonary disease	7.1%
Cancer	5.2%

Behavior / access	%
Smoking	19.9%
Binge drinking	14.1%
No physical activity	27.2%
Less than 7 hrs sleep	31.0%
Depression	20.6%
Fair or poor health	19.2%
Poor mental health	16.3%
Poor physical health	13.0%
No health insurance	24.8%
Visited doctor (checkup)	69.0%
Visited dentist	56.3%
Cholesterol screening	80.5%
Teeth loss	19.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,302	8.2%

Disability	%
Any disability	15.0%
Under 18	4.8%
18–64 years	14.2%
65 and over	46.9%

Health insurance coverage

Type	%
Private insurance	54.6%
Public insurance	39.7%
No insurance	15.3%
Uninsured under 19	8.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	36,679	92.5%
Spanish	3,872	10.6%
Other Indo-European	3,806	10.4%
Asian & Pacific Islander	2	0.0%
Other languages	36	0.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	34,223	86.3%
Born in same state	33,518	84.6%
Born in different state	17,802	44.9%
Foreign born	705	1.8%
Naturalized citizen	5,413	13.7%
Not a US citizen	1,883	34.8%

Ancestry

Ancestry	Count	%
French	4,512	11.4%
Italian	3,021	7.6%
Arab	1,432	3.6%
Polish	587	1.5%
English	583	1.5%

Ancestry	Count	%
Dutch	374	0.9%
Irish	329	0.8%
German	163	0.4%
Norwegian	56	0.1%

Technology access

Metric	% of households
Computer access	32.9%
Internet access	94.6%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 83605

What city is ZIP code 83605 in?

ZIP code 83605 is primarily assigned to Caldwell, Idaho.

What county is ZIP code 83605 in?

ZIP code 83605 falls within Canyon County, Idaho.

How educated is the population of ZIP code 83605?

14% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the population of ZIP code 83605?

ZIP code 83605 has an estimated population of 39,636 residents, with a density of 1,609 people per square mile.

What is the median household income in ZIP code 83605?

The median household income in ZIP code 83605 is $58,952, below the national median of ~$75,000.

What is the typical home value in ZIP code 83605?

The median home value in ZIP code 83605 is $256,200.

What timezone is ZIP code 83605 in?

ZIP code 83605 observes the MST timezone.